SRM1801 POWERED SUBWOOFER 1/4 PAGES FEATURES: ■ 18" Powered Subwoofer System ■ 18" woofer with a 3" voice coil delivers superior output and low-frequency extension ■ 1000W of efficient Class-D Fast Recovery ™ amplification ■ Mackie Active electronics provide total system optimization: • Precision crossover @ 125 Hz • Precision tuning filters for accurate bass response ■ Dual XLR inputs for mono or stereo applications ■ Stereo high-pass and full-range outputs ■ User-adjustable level and polarity controls ■ Individual power, signal, OL, and thermal protect indicators ■ Pole receptacle for mounting full-range loudspeakers ■ Solid plywood enclosure with high-durability, textured black paint ■ Extremely lightweight and portable (73 lb / 33.1 kg) SRM1801 Mackie SRM1801 powered subwoofers provide intense low- frequency extension and punch to the Mackie SRM450v2 and other powered loudspeakers. The SRM1801 powered subwoofer delivers 1000W peak power via Class-D Fast Recovery™ amplification. The Class-D amp design is ultra-efficient and, along with the lightweight switch-mode power supply, drastically reduces this subwoofer’s weight. Premium circuitry includes built-in Active electronics, like a precision crossover and tuning filters for accurate bass response. Also included with the SRM1801 are user-friendly features such as high-pass and full-range outputs for stereo operation with a single sub. A polarity switch allows phase alignment of the SRM1801 to the full-range loudspeakers. A custom-designed transducer maximizes efficiency and performance when matched with the system’s internal amp. The 18-inch woofer uses a ferrite magnet with a 3-inch voice coil. The solid plywood enclosure features a ported bass reflex design that produces tight low end. This makes the sub extremely lightweight and portable, without compromising power and performance. The integrated pole- cup accommodates a standard mounting pole. Pair the SRM1801 with the popular Mackie SRM450v2 or TH-15a for an extremely powerful, portable and professional PA solution. APPLICATIONS Small to mid-size club/band PA systems, houses of worship, DJs, rehearsal spaces, gymnasiums, banquet halls, A/V rentals and many, many more.
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SRM1801 POWERED SUBWOOFER
1/4 PAGES
FEATURES:■ 18" Powered Subwoofer System
■ 18" woofer with a 3" voice coil delivers superior output and low-frequency extension
■ 1000W of efficient Class-D Fast Recovery™ amplification
■ Mackie Active electronics provide total system optimization: •Precisioncrossover@125Hz •Precisiontuningfiltersforaccuratebassresponse
■ Solidplywoodenclosurewithhigh-durability,textured black paint
■ Extremelylightweightandportable(73lb/33.1kg)
SRM1801Mackie SRM1801 powered subwoofers provide intense low-frequency extension and punch to the Mackie SRM450v2 and other powered loudspeakers.
The SRM1801 powered subwoofer delivers 1000W peak power via Class-D Fast Recovery™ amplification. The Class-D amp design is ultra-efficient and, along with the lightweight switch-mode power supply, drastically reduces this subwoofer’s weight.
Premium circuitry includes built-in Active electronics, like a precision crossover and tuning filters for accurate bass response. Also included with the SRM1801 are user-friendly features such as high-pass and full-range outputs for stereo operation with a single sub. A polarity switch allows phase alignment of the SRM1801 to the full-range loudspeakers.
A custom-designed transducer maximizes efficiency and performance when matched with the system’s internal amp. The 18-inch woofer uses a ferrite magnet with a 3-inch voice coil.
The solid plywood enclosure features a ported bass reflex design that produces tight low end. This makes the sub extremely lightweight and portable, without compromising power and performance. The integrated pole-cup accommodates a standard mounting pole. Pair the SRM1801 with the popular Mackie SRM450v2 or TH-15a for an extremely powerful, portable and professional PA solution.
APPLICATIONSSmall to mid-size club/band PA systems, houses of worship, DJs, rehearsal spaces, gymnasiums, banquet halls, A/V rentals and many, many more.
Max SPL peak (measured) 2 124 dB1 Calculated from peak driver sensitivity and amplifier power, half space. 2 Measured with swept sine at 1 W within operating range, scaled for max power, half space.
TransducerDiameter 18.0 in / 457 mm
Voice Coil Diameter 3.0 in / 76 mm
Diaphragm Material Paper
Magnet Material Ferrite
Power AmplifierRated Power 500 watts rms 1000 watts peak
Rated THD < 0.1%
Cooling Convection
Design Class D
Input / OutputInput Type Female XLR Balanced differential (stereo left / right)
Input Impedance 20 k balanced
Full Range Output Male XLR Balanced (parallel with input)
High Pass Output Male XLR Balanced
Level Control -6 dB to +6 dB
Electronic CrossoverCrossover Type 24 dB / oct. Linkwitz-Riley
Crossover Frequency 125 Hz
Protection FeaturesOver-excursion Protection 40 Hz 24 dB / oct. Butterworth High Pass Filter
Thermal Protection Amplifier mute, auto reset
Driver Protection Peak / RMS Limiter
Display LEDs Thermal, OL, Signal, Power
Operating Temperature 0˚ - 40˚C 32˚ - 104˚F
AC Power RequirementsUS 100 - 120 VAC, 50 - 60 Hz 160 watts
EU 220 - 240 VAC, 50 - 60 Hz 160 watts
AC Connector 3-pin IEC 250 VAC 15 A male
Construction FeaturesBasic Design Trapezoidal
Material Void-free plywood
Finish Textured black catalyzed polyurethane paint
Handles One on each side
Grille Perforated metal
Physical Properties (packaged product)Height 27.2 in / 691 mm
Width 24.0 in / 610 mm
Depth 29.3 in / 744 mm
Shipping Weight 80.0 lb / 36.3 kg
Physical Properties (product)Height 24.1 in / 612 mm
Front Width 20.2 in / 513 mm
Rear Width 15.1 in / 383 mm
Depth 25.3 in / 643 mm
Weight 73 lb / 33.1 kg
Mounting MethodsFloor mount only WARNING: The cabinet has no rigging points and is not suitable for rigging. NEVER attempt to suspend the SRM1801 by its handles.
OptionsSPM200 Loudspeaker Pole Mount P/N 2035170-01
SRM1801 Cover P/N 2036809-05
Ordering InformationSRM1801 18" Powered Subwoofer, US P/N 0033250-00
SRM1801 18" Powered Subwoofer, EU P/N 0033250-01
3/4 PAGES
SRM1801 POWERED SUBWOOFER
BAINPUTS
BA
BA
OUTPUTSHIGH PASS
FULL RANGE
LEVEL
OL SIGNAL POWER
POLARITY
NORMALINVERT
THERMAL
+6dB 6dB-
18-INCH POWERED SOUND REINFORCEMENT SUBWOOFER
LEV
EL+
6dB
6dB
-
Inp
ut
XLR
s
H
igh
Pas
s O
utp
ut
XLR
s
Fu
ll R
ang
e O
utp
ut
XLR
s
Cro
sso
ver
Sig
nal
LE
DO
L LE
D
Ther
mal
L
ED
LPF
1
25 H
z
Ove
rexc
urs
ion
Pro
tect
ion
HPF
40 H
z
Th
erm
al
Mo
nit
ori
ng
Am
p
Lim
iter
Po
lari
ty
Inve
rt
Ther
mal
Mu
te
No
rmal
Inve
rted
Gai
n
A
ctiv
e
Sub
wo
ofe
r
Pro
cess
ing
Cro
sso
ver
HPF
1
25 H
z
Cro
sso
ver
HPF
1
25 H
z
SRM1801 BLOCK DIAGRAM
1/3
OC
TAV
E R
ESP
ON
SE
Norm
aliz
ed to
0 d
B SP
L
Frequency (Hz)
+10
+0
–10
–20
–30
–4020 50 100 200 400
SRM1801 FREQUENCY RESPONSE
SRM1801 INPUT PANEL
Part No. SW0849 Rev. B 07/11
4/4 PAGES
SRM1801 POWERED SUBWOOFER
POWER
I
O
BAINPUTS
BA
BA
OUTPUTSHIGH PASS
FULL RANGE
LEVEL
+6dB-6dB
U
OL SIGNAL POWER
POLARITY
NORMALINVERT
THERMAL
18-INCH POWERED SOUND REINFORCEMENT SUBWOOFER
612[24.1]
643[25.3]
513[20.2]
615[24.2]
353[13.9]
600[23.6]
383[15.1]
NOTES:1. WEIGHT APPROX. 33.1 kg [73 lb]2. SHIPPING WEIGHT APPROX. 36.3 kg [80 lb]